BBC News science correspondent David Shukman has been looking at the effects of deforestation on Borneo's rainforests.

The towering habitats play host to a diverse range of species and are also responsible for absorbing huge amounts of the greenhouse gas carbon dioxide. Scientists believe that protecting them will play a vital in curbing climate change.

As he inches his way down one of the rainforest's vast trees, David offers an insight into the layers that make up this vibrant ecosystem.

EMERGENT LAYER

The tops of the rainforest's very tallest trees - some reaching heights of more than 60m (200ft) - make up what scientists describe as the emergent layer.